1. 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 200 300 400 500 100 R. T. Correlation Half Life Vocabulary

2. Which era takes up the most amount of time

3. Precambrian

4. Name a species of trilobite

5. Elliptocephala, cryptolithhus or phacops

6. Which was first to evolve, birds or mammals

7. mammals

8. Lead is the stable product of the radioactive decay of which element

9. Uranium

10. A certain species of dinosaur grew from 15 ft to a height of 25 ft over 3 years. What is its rate of change? Round to nearest tenth and label.

11. 3.3 ft/yr

12. Give the specific names of two types of rock correlation

13. Fossil correlation, walking the outcrop, rock similarities

14. Give the two qualities of a good index fossil

15. Wide horizontal, short vertical, or lived everywhere for a short time

16. Name three features that are always younger than the rock they are in

17. Fold, fault, tilt, joint, intrusion

18. Name the two geologic principles used to relative age rock

19. Principle of horizonality and superposition

20. How can you tell an extrusion from an intrusion

21. Extrusions do not have contact metamorphism on all sides

22. Which is the only isotope for once living things

23. Carbon 14

24. How many grams of the original 50 g of C14 would be left after 34,200 years

25. .78 grams

26. How many original grams of C14 were there if 4 are left after 22,800 years

27. 64 g

28. How old is rock if it has undergone two half lives of K 40

29. 9 2.6 x 10

30. What percent of a radioactive substance is left after 4 half lives

31. 6.25%

32. Define uniformitarianism

33. Present is the key to the past

34. Define outcrop

35. Exposed bedrock

36. Define orogeny

37. Period of mountain building

38. Give the four steps for making an unconformity

39. Uplift, erosion, subsidence, deposition

40. What must a species do in order to survive

41. Adapt or produce variations